There are three more instances where undefined variables aren't checked in a way that works with the nounset flag

Example (dummy_test):

testDummy() {
  set -o nounset
  cleanupSpies
}

Output:

# dummy_test: 147: eval: _shpy_spies_dir: parameter not set

The other two instances involve createSpy: if a return value is passed via -r, and if no spy name is passed